I logged into my T-Moblie account today and I had a promo on every line for $0 for unlimited. All lines were previously 4gb. I’m not sure if it is for everyone with Simple Choice as I could not find anything anywhere advertising this so it is YMMV. Picture attached for proof. Let me know if anyone else is able to get this!
http://www.tmobile.com
https://imgur.com/a/BKpBlsX